Wheel drive assembly and vehicle

Abstract

The present invention relates to the technical field of wheel-side drive, and discloses a wheel-side drive assembly and a vehicle. The wheel-side drive assembly includes an integrated motor unit and a speed change unit, the motor unit includes a first drive motor and a second drive motor that are integrated and arranged in the length direction of the vehicle, and the speed change unit includes a first speed change mechanism and a second speed change mechanism; the first speed change mechanism includes a first input mechanism and a first output mechanism that are respectively arranged on both sides of the motor unit in the width direction of the vehicle and connected by an intermediate transmission mechanism, and the intermediate transmission mechanism passes through the gap between the first drive motor and the second drive motor; one of the first drive motor and the second drive motor is connected to the first input shaft of the first speed change mechanism for power transmission, and the other is connected to the second input shaft of the second speed change mechanism for power transmission. The wheel-side drive assembly is integrated into one body, has a compact structure, high space utilization, small volume and weight, and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of wheel-side drive, and in particular to a wheel-side drive assembly and a vehicle. Background Art

[0002] With the development of vehicle technology, electric vehicles are becoming more and more popular. For example, the four-wheel independent drive system of electric vehicles uses four motors to independently drive the four wheels of the vehicle. The torque and speed of the four wheels can be accurately controlled independently of each other, which brings a series of advantages, such as achieving smaller radius turns, assisting ESP functions, assisting steering functions, assisting braking functions, etc.

[0003] Generally, a wheel-side drive solution is often used in a four-wheel independent drive system. In the existing wheel-side drive solution, the left and right drive assemblies are often self-contained, occupying a large space and having a high cost. Summary of the invention

[0004] The object of the present invention is to provide a wheel-side drive assembly which is integrated into one body, has a compact structure, high space utilization, small volume and weight, and low cost.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a wheel-side drive assembly, which includes an integrated motor unit and a speed change unit, wherein the motor unit includes a first drive motor and a second drive motor that are integrated together and arranged in the vehicle length direction and horizontally placed in the vehicle width direction, that is, the motor unit includes a first drive motor and a second drive motor that are integrated together and arranged in the vehicle length direction, and the motor center axis of each of the first drive motor and the second drive motor is used to extend along the vehicle width direction, and the speed change unit includes a first speed change mechanism and a second speed change mechanism; the first speed change mechanism includes a first input mechanism and a first output mechanism that are respectively arranged on both sides of the motor unit in the vehicle width direction and connected by an intermediate transmission mechanism, and the intermediate transmission mechanism passes through the gap between the first drive motor and the second drive motor; one of the first drive motor and the second drive motor is connected to the first input shaft of the first speed change mechanism for power transmission, and the other is connected to the second input shaft of the second speed change mechanism for power transmission; the first output half shaft of the first speed change mechanism and the second output half shaft of the second speed change mechanism are arranged with the half shaft center axis A.

[0006] In this technical solution, the motor unit and the speed change unit are integrated together, and the motor unit includes a first drive motor and a second drive motor that are integrated together and arranged in the length direction of the vehicle and horizontally arranged in the width direction of the vehicle. In this way, the first drive motor and the second drive motor can adopt slender drive motors with small core diameter and long length, so that the two drive motors are arranged in parallel in the length direction of the vehicle, which makes full use of the space in the length direction of the vehicle (X direction) and reduces the space occupied by the wheel-side drive assembly in the height direction (Z direction) of the vehicle, thereby providing Z-direction installation space for the subsequent installation of the electronic control unit. At the same time, the first speed change mechanism is included in the vehicle width direction. The first input mechanism and the first output mechanism are respectively arranged on both sides of the motor unit and connected by an intermediate transmission mechanism. The intermediate transmission mechanism passes through the gap between the first drive motor and the second drive motor. One of the first drive motor and the second drive motor is connected to the first input shaft of the first transmission mechanism for power transmission, and the other is connected to the second input shaft of the second transmission mechanism for power transmission. In this way, the space in the width direction (Y direction) of the vehicle can be fully utilized, so that the overall structure of the wheel-side drive assembly is compact and the space utilization rate is high, thereby realizing a high degree of integration of the wheel-side drive assembly. Therefore, the wheel-side drive assembly has a compact structure, a high space utilization rate, a small volume and weight, and a low cost.

[0007] Furthermore, the center axis A of the half shaft coincides with the motor center axis B of the second drive motor.

[0008] Further, the first input mechanism includes a first input gear set, the intermediate transmission mechanism includes a first intermediate shaft, and the first output mechanism includes a first output gear set, wherein the first input gear set is arranged on the first input shaft and the first intermediate shaft, and the first output gear set is arranged on the first intermediate shaft and the first output half shaft.

[0009] Furthermore, in the first speed change mechanism, the power transmission path from the first input shaft to the first output half shaft is a U-shaped transmission path, wherein a first angle between a line connecting the axial center of the first input shaft and the axial center of the first intermediate shaft and a line connecting the axial center of the first output half shaft and the axial center of the first intermediate shaft is less than 90°.

[0010] In addition, the second speed change mechanism includes a second input shaft, a second intermediate shaft, a second input gear set arranged on the second input shaft and the second intermediate shaft, and a second output gear set arranged on the second intermediate shaft and the second output half shaft, wherein the second input gear set and the second output gear set are arranged on one side of the motor unit.

[0011] Further, in the second speed change mechanism, the power transmission path from the second input shaft to the second output half shaft is a U-shaped transmission path, wherein a second angle between a line connecting the axial center of the second input shaft and the axial center of the second intermediate shaft and a line connecting the axial center of the second output half shaft and the axial center of the second intermediate shaft is less than 90°.

[0012] Furthermore, the speed change unit includes a first speed change mechanism housing, the first speed change mechanism housing and a portion of a side wall of the motor unit form a first cavity, and the first output mechanism is disposed in the first cavity.

[0013] Further, the speed change unit comprises a second speed change mechanism housing and a third speed change mechanism housing, the second speed change mechanism housing and at least a portion of the other side wall of the motor unit enclose a second cavity, the third speed change mechanism housing is arranged on the axial side of the second speed change mechanism housing to enclose a third cavity with at least a portion of the second speed change mechanism housing; wherein the first input mechanism is arranged in the second cavity, and the second input gear set and the second output gear set of the second speed change mechanism are arranged in the third cavity;

[0014] or,

[0015] The first input mechanism and the second input driving gear of the second input gear set of the second speed change mechanism are arranged in the second chamber, and the second input driven gear of the second input gear set of the second speed change mechanism and the second output gear set of the second speed change mechanism are arranged in the third chamber.

[0016] In addition, the motor unit includes a motor housing, a first drive motor assembly and a second drive motor assembly, wherein the first drive motor assembly and the second drive motor assembly are arranged in the motor housing and spaced apart in the length direction of the vehicle, and the motor assembly center axes of the first drive motor assembly and the second drive motor assembly are respectively used to extend in the width direction of the vehicle to form the first drive motor and the second drive motor that share the same motor housing, that is, the first drive motor assembly and the second drive motor assembly are arranged in the motor housing and arranged in the length direction of the vehicle and horizontally in the width direction of the vehicle.

[0017] In addition, a motor cooling water channel is arranged in the motor housing of the motor unit, and the motor cooling water channel includes a cooling water inlet and a cooling water outlet, wherein the motor cooling water channel starts from the cooling water inlet and is alternately wound on the first drive motor and the second drive motor and extends to the cooling water outlet.

[0018] In addition, the wheel-side drive assembly includes a flat electronic control unit, wherein in the height direction of the vehicle, the flat electronic control unit is fixedly connected to the top of the motor unit and the speed change unit.

[0019] Furthermore, a motor cooling water channel is provided in the motor housing of the motor unit, and an electric control cooling water channel is provided in the electric control housing of the flat electric control unit, wherein the motor cooling water channel and the electric control cooling water channel are sealed and connected.

[0020] Furthermore, one of the motor unit and the flat electric control unit includes a copper bar, and the other of the motor unit and the flat electric control unit includes a copper bar connection end, and the copper bar connection end is connected to the copper bar, wherein the electric control housing of the flat electric control unit includes an openable maintenance cover located at the connection between the copper bar connection end and the copper bar.

[0021] Furthermore, the wheel-side drive assembly includes a rotating transformer and a temperature sensor, wherein the rotating transformer and the temperature sensor extend into the motor housing of the motor unit, and the connection lines between the rotating transformer and the temperature sensor and the flat electronic control unit are respectively blocked by the electronic control housing of the flat electronic control unit and the motor housing and do not leak out.

[0022] Finally, the present invention provides a vehicle, which is provided with any of the above-mentioned wheel-side drive assemblies, wherein one of the first output half shaft and the second output half shaft serves as a left output half shaft and the other serves as a right output half shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a wheel side drive assembly provided in a specific embodiment of the present invention;

[0024] Figure 2 is another schematic diagram of a wheel side drive assembly provided in a specific embodiment of the present invention;

[0025] Figure 3 It is a schematic structural diagram of a disassembled flat electric control unit and a motor unit in a structure of a wheel side drive assembly provided by a specific embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of a motor cooling water channel of a motor unit in a wheel side drive assembly provided in a specific embodiment of the present invention;

[0027] Figure 5 It is another schematic diagram of a motor cooling water channel of a motor unit in a wheel side drive assembly provided in a specific embodiment of the present invention;

[0028] Figure 6It is a schematic structural diagram of a disassembled flat electronic control unit and a motor unit in another structure of a wheel-side drive assembly provided in a specific embodiment of the present invention.

[0029] Description of Reference Numerals

[0030] 1-first input gear set, 2-first output gear set, 3-motor unit, 4-first drive motor, 5-second drive motor, 6-first input shaft, 7-second input shaft, 8-first output half shaft, 9-second output half shaft, 10-first intermediate shaft, 11-second intermediate shaft, 12-second input gear set, 13-second output gear set, 14-first speed change mechanism housing, 15-first cavity, 16-second speed change mechanism housing, 17-motor housing, 18-third speed change mechanism housing, 19-second cavity, 20-flat electronic control unit, 21-motor cooling water channel, 22-cooling water inlet, 23-cooling water outlet, 24-copper busbar, 25-maintenance cover, 26-third cavity, 27-second input driving gear, 28-second input driven gear. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0032] refer to Figure 1 and Figure 2 The two schematic structures shown in the figure, the wheel-side drive assembly provided by the present invention includes an integrated motor unit 3 and a speed change unit, wherein the motor unit 3 includes a first drive motor 4 and a second drive motor 5 which are integrated together and arranged in the length direction of the vehicle, and the motor center axis of the first drive motor 4 and the second drive motor 5 are respectively used to extend along the width direction of the vehicle, that is, the motor unit 3 includes a first drive motor 4 and a second drive motor 5 which are integrated together and arranged in the length direction of the vehicle and are horizontally placed along the width direction of the vehicle, and the speed change unit includes a first speed change mechanism and a second speed change mechanism; the first speed change mechanism includes a first input mechanism and a first output mechanism which are respectively arranged on both sides of the motor unit in the width direction of the vehicle and connected by an intermediate transmission mechanism, and the intermediate transmission mechanism passes through the gap between the first drive motor 4 and the second drive motor 5; one of the first drive motor 4 and the second drive motor 5 is connected to the first input shaft 6 of the first speed change mechanism for power transmission, and the other is connected to the second input shaft 7 of the second speed change mechanism for power transmission; the first output half shaft 8 of the first speed change mechanism and the second output half shaft 9 of the second speed change mechanism are arranged with the half shaft center axis A.

[0033] The motor unit and the speed change unit are integrated together, and the motor unit includes a first drive motor and a second drive motor that are integrated together and arranged in the length direction of the vehicle and are transversely arranged in the width direction of the vehicle. In this way, the first drive motor and the second drive motor can adopt slender drive motors with small core diameter and long length, so that the two drive motors are arranged in parallel in the length direction of the vehicle, which makes full use of the space in the length direction (X direction) of the vehicle and reduces the space occupied by the wheel-side drive assembly in the height direction (Z direction) of the vehicle, thereby providing Z-direction installation space for the subsequent installation of the electronic control unit. At the same time, the first speed change mechanism includes The first input mechanism and the first output mechanism are arranged on both sides of the motor unit and connected by an intermediate transmission mechanism, and the intermediate transmission mechanism passes through the gap between the first drive motor and the second drive motor. One of the first drive motor and the second drive motor is connected to the first input shaft of the first transmission mechanism for power transmission, and the other is connected to the second input shaft of the second transmission mechanism for power transmission. In this way, the space in the width direction (Y direction) of the vehicle can be fully utilized, so that the overall structure of the wheel-side drive assembly is compact and the space utilization rate is high, thereby realizing a high degree of integration of the wheel-side drive assembly. Therefore, the wheel-side drive assembly has a compact structure, a high space utilization rate, a small volume and weight, and a low cost.

[0034] In addition, in the wheel side drive assembly, the half shaft center axis A and the motor center axis B of the second drive motor 5 can be arranged in a staggered manner. Figure 1 and Figure 2 , the center axis A of the half shaft coincides with the motor center axis B of the second drive motor 5. In this way, the power transmission structure in the transmission unit can be made compact, the length of the transmission unit in the vehicle length direction can be reduced, and the requirements for the layout of the entire vehicle can be met, avoiding interference with the subframe or the vehicle body, and improving space utilization.

[0035] In addition, the first input mechanism may include a variety of structural forms, for example, it may include a worm gear transmission pair. In addition, the intermediate transmission mechanism may also include a worm, that is, the worm passes through the gap between the first drive motor 4 and the second drive motor 5, and the two ends of the worm are respectively engaged with a turbine. In addition, the first output mechanism may also include a turbine component.

[0036] Alternatively, reference 1 and Figure 2, the first input mechanism includes a first input gear set 1, the intermediate transmission mechanism includes a first intermediate shaft 10, and the first output mechanism includes a first output gear set 2, wherein the first input gear set 1 is arranged on the first input shaft 6 and the first intermediate shaft 10, and the first output gear set 2 is arranged on the first intermediate shaft 10 and the first output half shaft 8. In this way, one of the first drive motor 4 and the second drive motor 5 transmits power to the first input shaft 6, and transmits it to the first intermediate shaft 10 through the first input gear set 1, and the first intermediate shaft 10 transmits power to the first output half shaft 8 through the first output gear set 2.

[0037] In addition, refer to Figure 1 As shown, in the first speed change mechanism, the power transmission path from the first input shaft 6 to the first output half shaft 8 can be a Z-shaped transmission path similar to the Z-shaped one, so that the first angle between the line connecting the axial center of the first input shaft 6 and the axial center of the first intermediate shaft 10 and the line connecting the axial center of the first output half shaft 8 and the axial center of the first intermediate shaft 10 is greater than 90°, and the first angle can be other angles greater than 90°, such as 135°, 150° or 180°. In this way, the first input mechanism and the first output mechanism of the first speed change mechanism can be arranged more compactly close to the motor unit 3, further reducing the width of the first speed change mechanism in the Y direction, thereby further reducing the width of the wheel-side drive assembly in the Y direction.

[0038] Optionally, refer to Figure 2 In the first speed change mechanism, the power transmission path from the first input shaft 6 to the first output half shaft 8 is a U-shaped transmission path, wherein the first angle between the line connecting the axial center of the first input shaft 6 and the axial center of the first intermediate shaft 10 and the line connecting the axial center of the first output half shaft 8 and the axial center of the first intermediate shaft 10 is less than 90°, and the first angle can be other angles less than 90°, such as 45° or 30°. In this way, when the first drive motor and the second drive motor adopt slender drive motors with small core diameter and long length, the first speed change mechanism can be arranged more compactly close to the motor unit 3, further reducing the width of the first speed change mechanism in the Y direction, thereby further reducing the width of the wheel side drive assembly in the Y direction.

[0039] In addition, the first input gear set 1 and the first output gear set 2 may each include three or more gears meshed in sequence. Figure 1 and Figure 2 The first input gear set 1 and the first output gear set 2 respectively include a pair of gears. In this way, while realizing power speed transmission, the first speed change mechanism can be made more compact, simpler in structure, lighter in weight, and lower in cost.

[0040] In addition, refer to Figure 1 and Figure 2The second speed change mechanism comprises a second input shaft 7, a second intermediate shaft 11, a second input gear set 12 arranged on the second input shaft 7 and the second intermediate shaft 11, and a second output gear set 13 arranged on the second intermediate shaft 11 and the second output half shaft 9, wherein the second input gear set 12 and the second output gear set 13 are arranged on one side of the motor unit. In this way, since the second speed change mechanism is arranged on one side of the motor unit 3, the second speed change mechanism can be simplified, so that the second speed change mechanism can be arranged more compactly, which can further reduce the width of the speed change unit in the Y direction, thereby further reducing the width of the wheel side drive assembly in the Y direction.

[0041] In addition, the second input gear set 12 and the second output gear set 13 may respectively include three or more gears meshed in sequence. Figure 1 and Figure 2 The second input gear set 12 and the second output gear set 13 respectively include a pair of gears. In this way, while realizing power speed transmission, the second speed change mechanism can be made more compact, simpler in structure, lighter in weight, and lower in cost.

[0042] In addition, refer to Figure 1 In the second speed change mechanism, the power transmission path from the second input shaft 7 to the second output half shaft 9 is a U-shaped transmission path, wherein the second angle between the line connecting the axial center of the second input shaft 7 and the axial center of the second intermediate shaft 11 and the line connecting the axial center of the second output half shaft 9 and the axial center of the second intermediate shaft 11 is less than 90°, and the second angle can be other angles less than 90°, such as 45° or 30°. In this way, the second speed change mechanism can be arranged more compactly close to the motor unit 3, thereby further reducing the width of the second speed change mechanism in the Y direction, thereby further reducing the width of the wheel side drive assembly in the Y direction.

[0043] In addition, refer to Figure 2 In the second speed change mechanism, the power transmission path from the second input shaft 7 to the second output half shaft 9 is a Z-shaped transmission path similar to a Z-shaped one, so that the second angle between the line connecting the axial center of the second input shaft 7 and the axial center of the second intermediate shaft 11 and the line connecting the axial center of the second output half shaft 9 and the axial center of the second intermediate shaft 11 is greater than 90°, and the second angle can be other angles greater than 90°, such as 135°, 150° or 180°. In this way, the second speed change mechanism can be arranged closer to the motor unit 3 more compactly, thereby further reducing the width of the second speed change mechanism in the Y direction, thereby further reducing the width of the wheel side drive assembly in the Y direction.

[0044] In addition, refer to Figure 1 and Figure 2The speed change unit includes a first speed change mechanism housing 14, and the first speed change mechanism housing 14 and a part of a side wall of the motor unit form a first cavity 15, and the first output mechanism is arranged in the first cavity 15. In this way, since the first speed change mechanism housing 14 and a part of a side wall of the motor unit form the first cavity 15, that is, a part of a side wall of the motor unit serves as the inner wall of the first cavity 15, the weight can be reduced and the cost can be reduced. At the same time, the length of the first speed change mechanism housing 14 in the X direction can be made smaller than the length of the motor unit, thereby forming an avoidance space, and the avoidance space can be used to set the accessories of the wheel side drive assembly or the structure of the vehicle body.

[0045] In addition, refer to Figure 2 The speed change unit includes a second speed change mechanism housing 16 and a third speed change mechanism housing 18. The second speed change mechanism housing 16 and at least a portion of the other side wall of the motor unit form a second cavity 19. The third speed change mechanism housing 18 is arranged on the axial side of the second speed change mechanism housing 16 to form a third cavity 26 with at least a portion of the second speed change mechanism housing 16. The first input mechanism is arranged in the second cavity 19, and the second input gear set 12 and the second output gear set 13 of the second speed change mechanism are arranged in the third cavity 26. In this way, the internal space of the motor unit and the second cavity 19 share a common side wall, and the second cavity and the third cavity 26 share a common side wall, thereby further reducing weight and reducing costs. At the same time, if necessary, an avoidance space can also be formed, and the avoidance space can be used to set accessories of the wheel side drive assembly or a structure to accommodate the vehicle body. Alternatively, refer to Figure 1 The second input driving gear 27 of the first input mechanism and the second input gear set 12 of the second speed change mechanism is arranged in the second cavity 19, and the second input driven gear 28 of the second input gear set 12 of the second speed change mechanism and the second output gear set 13 of the second speed change mechanism are arranged in the third cavity 26. In this way, the structure of the second speed change mechanism housing 16 can be simplified accordingly to further reduce weight and cost.

[0046] In addition, the housings of the first drive motor 4 and the second drive motor 5 can be integrated, for example, welded together, or, as shown in FIG. Figure 1 and Figure 2As shown, the first drive motor 4 and the second drive motor 5 share the same motor housing, that is, the motor unit includes a motor housing 17, a first drive motor assembly and a second drive motor assembly, wherein the first drive motor assembly and the second drive motor assembly are arranged in the motor housing 17 and spaced apart in the vehicle length direction, and the motor assembly center axis of the first drive motor assembly and the second drive motor assembly are respectively used to extend along the vehicle width direction to form the first drive motor 4 and the second drive motor 5 that share the same motor housing 17, that is, the first drive motor assembly and the second drive motor assembly are arranged in the motor housing 17 and arranged in the vehicle length direction and transversely along the vehicle width direction, thus forming the first drive motor 4 and the second drive motor 5 that are integrated together. In this way, the motor housing 17 and the speed change unit can share the side wall, thereby further improving the integration of the wheel side drive assembly.

[0047] In addition, refer to Figure 4 and Figure 5 As shown, a motor cooling water channel 21 is provided in the motor housing of the motor unit 3, and the motor cooling water channel 21 includes a cooling water inlet 22 and a cooling water outlet 23, wherein the motor cooling water channel 21 is alternately wound around the first drive motor 4 and the second drive motor 5 from the cooling water inlet and extends to the cooling water outlet 23. In this way, after the cooling water enters the motor cooling water channel 21 from the cooling water inlet 22, it will alternately flow through the first drive motor 4 and the second drive motor 5 in sequence, thereby ensuring that the first drive motor 4 and the second drive motor 5 can be cooled to the same extent, and improving the balance of heat dissipation.

[0048] In addition, the same motor housing shared by the first drive motor 4 and the second drive motor 5 is easier to be provided with such a motor cooling water channel 21 .

[0049] Of course, optionally, the cooling water channels on the respective shells of the first drive motor 4 and the second drive motor 5 can also be connected alternately in sequence, so that the formed motor cooling water channel 21 starts from the cooling water inlet and alternately winds on the first drive motor 4 and the second drive motor 5 to extend to the cooling water outlet 23.

[0050] The motor cooling water channel 21 starts from the cooling water inlet and is alternately wound around the first drive motor 4 and the second drive motor 5 and extends to the cooling water outlet 23. There are many ways to do this, for example, Figure 4 In the manner, the motor cooling water channel 21 is wound around the first drive motor 4 (e.g., the first drive motor assembly) once, then wound around the second drive motor 5 (e.g., the second drive motor assembly) in the middle of the two drive motors, and then wound around the first drive motor 4 in the middle of the two drive motors, and the winding is alternated in sequence. Figure 5In the method, the motor cooling water channel 21 is wound around the first drive motor 4 to the upper part in the middle of the two drive motors, then axially bends and returns to be wound around the first drive motor 4 to the lower part in the middle of the two drive motors, and then is wound around the second drive motor 5 to the upper part in the middle of the two drive motors, then axially bends and returns to be wound around the second drive motor 5 to the lower part in the middle of the two drive motors, and then is wound around the first drive motor 4, and the windings are alternately performed in sequence.

[0051] Further, the cooling water inlet 22 and the cooling water outlet 23 of the motor cooling water channel 21 are formed at a middle position between the first drive motor 4 and the second drive motor 5 .

[0052] In addition, refer to Figure 3 The wheel side drive assembly includes a flat electric control unit 20, wherein the flat electric control unit 20 is fixedly connected to the top of the motor unit 3 and the speed change unit in the vehicle height direction. Thus, by adopting the flat electric control unit 20, the height of the wheel side drive assembly in the vehicle height direction can be reduced, and at the same time, the electric control unit, the motor unit and the speed change unit of the wheel side drive assembly can be more integrated.

[0053] In addition, a motor cooling water channel is provided in the motor housing of the motor unit 3, and an electric control cooling water channel is provided in the electric control housing of the flat electric control unit 20, wherein the motor cooling water channel and the electric control cooling water channel are sealed and connected. For example, the electric control cooling water channel can be formed with a total water inlet, so that the cooling water enters the electric control cooling water channel from the total water inlet to cool the flat electric control unit 20. Since the flat shape of the flat electric control unit 20 can increase the heat dissipation area, and at the same time, the heat dissipation of the flat electric control unit 20 is small, the temperature of the cooling water will basically not rise, so it can continue to flow into the motor cooling water channel to cool the two drive motors alternately in sequence. The cooling water can be directly discharged from the cooling water outlet 23 of the motor unit 3.

[0054] Alternatively, optionally, when the flat electronic control unit 20 includes a total water outlet, the cooling water discharged from the cooling water outlet 23 can be discharged from the total water outlet of the flat electronic control unit 20, so that the flat electronic control unit 20 can be conveniently assembled on the motor unit 3 without avoiding the cooling water outlet 23.

[0055] In addition, in one embodiment, reference Figure 3 An embodiment shown and Figure 6In another embodiment shown, one of the motor unit 3 and the flat electric control unit 20 includes a copper bar 24, and the other of the motor unit 3 and the flat electric control unit 20 includes a copper bar connection end, and the copper bar connection end is connected to the copper bar 24, wherein the electric control housing of the flat electric control unit 20 includes an openable maintenance cover 25 located at the connection between the copper bar connection end and the copper bar 24. In this way, through the connection between the copper bar connection end and the copper bar 24, the three-phase electrical connection between the motor unit 3 and the flat electric control unit 20 can be conveniently achieved, making the wheel-side drive assembly more integrated. Furthermore, after the motor unit 3 and the flat electric control unit 20 are connected, the housing of the motor unit 3 and the housing of the flat electric control unit 20 will shield the copper bar connection end and the copper bar 24 from leaking out, which can help meet the protection requirements.

[0056] In addition, in one embodiment, the wheel-side drive assembly includes a rotating transformer and a temperature sensor, wherein the rotating transformer and the temperature sensor extend into the motor housing of the motor unit 3, and the connection lines between the rotating transformer and the temperature sensor and the flat electric control unit 20 are respectively blocked by the electric control housing and the motor housing of the flat electric control unit 20 and do not leak out. That is, after the flat electric control unit 20 and the motor unit 20 are connected, the connection lines between the rotating transformer and the temperature sensor and the flat electric control unit 20 are respectively blocked, which can help meet the protection requirements.

[0057] Finally, the present invention provides a vehicle, which is provided with any of the above-mentioned wheel-side drive assemblies, wherein one of the first output half shaft 8 and the second output half shaft 9 is used as a left output half shaft and the other is used as a right output half shaft. The left output half shaft and the right output half shaft are respectively connected to the left wheel and the right wheel of the vehicle for power transmission. In this way, the overall quality of the vehicle is effectively improved.

[0058] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0059] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0060] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A wheel drive assembly, characterized in that: The invention comprises a motor unit (3) and a transmission unit which are integrated together, wherein the motor unit (3) comprises a first drive motor (4) and a second drive motor (5) which are integrated together and arranged in the vehicle length direction, and the motor center axis of each of the first drive motor (4) and the second drive motor (5) is used to extend in the vehicle width direction, and the transmission unit comprises a first transmission mechanism and a second transmission mechanism; The first transmission mechanism comprises a first input mechanism and a first output mechanism which are respectively arranged on both sides of the motor unit in the vehicle width direction and connected by an intermediate transmission mechanism, wherein the intermediate transmission mechanism passes through the gap between the first drive motor (4) and the second drive motor (5); One of the first drive motor (4) and the second drive motor (5) is connected to the first input shaft (6) of the first transmission mechanism for power transmission, and the other is connected to the second input shaft (7) of the second transmission mechanism for power transmission; The first output half shaft (8) of the first speed change mechanism and the second output half shaft (9) of the second speed change mechanism are arranged coexisting with the half shaft center axis A.

2. The wheel side drive assembly according to claim 1, characterized in that: The center axis A of the half shaft coincides with the motor center axis B of the second drive motor (5).

3. The wheel side drive assembly according to claim 1, characterized in that: The first input mechanism comprises a first input gear set (1), the intermediate transmission mechanism comprises a first intermediate shaft (10), and the first output mechanism comprises a first output gear set (2), wherein: The first input gear set (1) is arranged on the first input shaft (6) and the first intermediate shaft (10), and the first output gear set (2) is arranged on the first intermediate shaft (10) and the first output half shaft (8).

4. The wheel side drive assembly according to claim 3, characterized in that: In the first transmission mechanism, the power transmission path from the first input shaft (6) to the first output half shaft (8) is a U-shaped transmission path, wherein a first angle between a line connecting the axial center of the first input shaft (6) and the axial center of the first intermediate shaft (10) and a line connecting the axial center of the first output half shaft (8) and the axial center of the first intermediate shaft (10) is less than 90°.

5. The wheel side drive assembly according to claim 1, characterized in that: The second speed change mechanism comprises a second intermediate shaft (11), a second input gear set (12) arranged on the second input shaft (7) and the second intermediate shaft (11), and a second output gear set (13) arranged on the second intermediate shaft (11) and the second output half shaft (9), wherein the second input gear set (12) and the second output gear set (13) are arranged on one side of the motor unit.

6. The wheel side drive assembly according to claim 5, characterized in that: In the second speed change mechanism, the power transmission path from the second input shaft (7) to the second output half shaft (9) is a U-shaped transmission path, wherein a second angle between a line connecting the axial center of the second input shaft (7) and the axial center of the second intermediate shaft (11) and a line connecting the axial center of the second output half shaft (9) and the axial center of the second intermediate shaft (11) is less than 90°.

7. The wheel drive assembly according to claim 1, characterized in that: The speed change unit comprises a first speed change mechanism housing (14), wherein the first speed change mechanism housing (14) and a part of a side wall of the motor unit form a first cavity (15), and the first output mechanism is arranged in the first cavity (15).

8. The wheel side drive assembly according to claim 7, characterized in that: The speed change unit comprises a second speed change mechanism housing (16) and a third speed change mechanism housing (18), wherein the second speed change mechanism housing (16) and at least a portion of the other side wall of the motor unit enclose a second cavity (19), and the third speed change mechanism housing (18) is arranged on the axial side of the second speed change mechanism housing (16) to enclose a third cavity (26) with at least a portion of the second speed change mechanism housing (16); The first input mechanism is arranged in the second chamber (19), and the second input gear set (12) and the second output gear set (13) of the second speed change mechanism are arranged in the third chamber (26); or, The first input mechanism and the second input driving gear (27) of the second input gear set (12) of the second speed change mechanism are arranged in the second chamber (19), and the second input driven gear (28) of the second input gear set (12) of the second speed change mechanism and the second output gear set (13) of the second speed change mechanism are arranged in the third chamber (26).

9. The wheel side drive assembly according to claim 1, characterized in that: The motor unit comprises a motor housing (17), a first drive motor assembly and a second drive motor assembly, wherein the first drive motor assembly and the second drive motor assembly are arranged in the motor housing (17) and spaced apart in the length direction of the vehicle, and the motor assembly center axes of the first drive motor assembly and the second drive motor assembly are respectively used to extend in the width direction of the vehicle to form the first drive motor (4) and the second drive motor (5) which share the same motor housing (17).

10. The wheel side drive assembly according to claim 1, characterized in that: A motor cooling water channel (21) is provided in the motor housing of the motor unit (3), and the motor cooling water channel (21) comprises a cooling water inlet (22) and a cooling water outlet (23), wherein the motor cooling water channel (21) starts from the cooling water inlet and is alternately wound on the first drive motor (4) and the second drive motor (5) and extends to the cooling water outlet (23).

11. The wheel drive assembly according to any one of claims 1 to 10, characterized in that: The wheel side drive assembly comprises a flat electric control unit (20), wherein in the vehicle height direction, the flat electric control unit (20) is fixedly connected to the top of the motor unit (3) and the speed change unit.

12. The wheel drive assembly according to claim 11, characterized in that: A motor cooling water channel is provided in the motor housing of the motor unit (3), and an electric control cooling water channel is provided in the electric control housing of the flat electric control unit (20), wherein the motor cooling water channel and the electric control cooling water channel are sealed and connected.

13. The wheel drive assembly according to claim 11, characterized in that: One of the motor unit (3) and the flat electric control unit (20) comprises a copper bar (24), and the other of the motor unit (3) and the flat electric control unit (20) comprises a copper bar connection end, wherein the copper bar connection end is connected to the copper bar (24), wherein the electric control housing of the flat electric control unit (20) comprises an openable maintenance cover (25) located at the connection between the copper bar connection end and the copper bar (24).

14. The wheel drive assembly according to claim 11, characterized in that: The wheel-side drive assembly comprises a rotary transformer and a temperature sensor, wherein the rotary transformer and the temperature sensor extend into the motor housing of the motor unit (3), and the connection lines between the rotary transformer and the temperature sensor and the flat electric control unit (20) are shielded by the electric control housing of the flat electric control unit (20) and the motor housing and do not leak out.

15. A vehicle, characterized in that: The vehicle is provided with a wheel-side drive assembly as described in any one of claims 1 to 14, wherein one of the first output half shaft (8) and the second output half shaft (9) serves as a left output half shaft and the other serves as a right output half shaft.

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